🔗 Share this article

This year's prestigious award in medical science has been granted for transformative findings that clarify how the immune system targets dangerous infections while protecting the body's own cells.

A trio of esteemed researchers—from Japan Shimon Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—received this honor.

Their research identified unique "security guards" within the immune system that eliminate rogue defense cells that could harming the body.

The findings are now paving the way for innovative treatments for immune disorders and malignancies.

These laureates will share a prize fund worth 11 million SEK.

Crucial Discoveries

"The research has been decisive for understanding how the immune system functions and why we do not all suffer from serious self-attack conditions," stated the chair of the Nobel Committee.

The team's studies address a core mystery: How does the defense system defend us from countless invaders while leaving our healthy cells unharmed?

The body's protection system employs immune cells that search for indicators of infection, including viruses and bacteria it has never encountered.

Such defenders employ detectors—known as recognition units—that are produced randomly in countless combinations.

This provides the immune system the ability to combat a wide array of threats, but the randomness of the mechanism unavoidably creates white blood cells that can target the body.

Protectors of the Immune System

Scientists earlier understood that a portion of these problematic defense cells were destroyed in the thymus—where immune cells mature.

This year's award honors the identification of regulatory T-cells—described as the body's "peacekeepers"—which travel through the body to disarm any defenders that assault the healthy cells.

We know that this mechanism fails in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and RA.

A Nobel panel added, "The discoveries have laid the foundation for a new field of investigation and accelerated the creation of new treatments, for instance for tumors and autoimmune diseases."

Regarding malignancies, regulatory T-cells prevent the system from fighting the growth, so studies are aimed at reducing their quantity.

For self-attack disorders, experiments are testing increasing T-reg cells so the body is no longer being harmed. A comparable method could also be useful in minimizing the chances of transplanted organ rejection.

Pioneering Experiments

Professor Sakaguchi, from a Japanese institution, performed experiments on mice that had their thymus removed, causing self-attack conditions.

The researcher demonstrated that injecting immune cells from other mice could prevent the illness—suggesting there was a system for preventing defenders from harming the body.

Mary Brunkow, from the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an genetic immune disorder in mice and people that resulted in the identification of a genetic factor critical for how regulatory T-cells operate.

"The groundbreaking work has uncovered how the body's defenses is controlled by T-reg cells, preventing it from accidentally attacking the healthy cells," said a leading biological science expert.

"The work is a remarkable example of how fundamental biological study can have broad implications for human health."